Building materials

In the process of construction, operation and repair of buildings and facilities construction products and structures, from which they are built, are subjected to various mechanical, physical and technological influences. From engineer required with knowledge of the case to select the right material, product or design that has the durability, reliability and durability for the conditions. Building materials and products in accordance with the theory of the CLAIM, are divided into: Natural - without changing the composition and internal structure: inorganic (stone materials and products); organic (wood materials, straw, fire, cane, husks, wool, collagen). Artificial: Chemically bonded (hardening under normal conditions) and pressure oxidation (hardening at a temperature of 175-200 C and the vapor pressure of 0.9-1.6 MPa); inorganic (ceramic and clinterocera cements, gypsum, magnesia, etc.); organic (bitumen and dective binders, emulsions, pastes); polymer (thermoplastic and thermosetting); complex: mixed (mixing several kinds of mineral substances); compounded (mixtures and alloys of organic materials); combined (Association of mineral with organic or polymer). Kiln - hardening from the fire melts: slag (chemical basicity of slag); ceramic (the nature and types of clay, etc. components); stelmacovich (in terms of the alkalinity of the charge); cast stone (type of rock); comprehensive (by type of mating components, for example: slackerjack, stellalove). On the application are classified into two main categories. The first category is construction: brick, concrete, cement, timber, etc. They are used in the construction of various elements of buildings (walls, floors, surfaces, floors). The second category is a special purpose: waterproofing, thermal insulation, acoustic, finishing, etc. Main types of building materials and products stone-natural building materials and products from them astringent inorganic and organic materials forest materials and products from them metal products Depending on the appointment, conditions of construction and operation of buildings and structures are selected corresponding building materials that possess certain qualities and protective properties from exposure to different external environment. Given these features, any building material must have certain construction and technical properties. For example, the material for outer walls of buildings must have the lowest thermal conductivity with sufficient strength to protect the room from heat loss; the material of construction of irrigation and drainage purposes - water-resistance and resistance to alternate wetting and drying; material for road paving (asphalt, concrete) must have sufficient strength and low friability to withstand loads from transport.